/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 苏李涛
 * Date: 2024-11-09
 * Time: 0:30
 */

//模拟专题->替换所有的问号
public class Demo {
    public String modifyString(String ss) {
        char[] s = ss.toCharArray();

        int n = s.length;
        for(int i = 0; i < n; i++){
            if(s[i] == '?'){
                for(char ch = 'a'; ch <= 'z'; ch++){
                    if((i == 0 || ch != s[i-1]) && (i == n-1 || ch != s[i+1])){
                        s[i] = ch;
                        break;
                    }
                }
            }
        }

        return String.valueOf(s);
    }
}
